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Connect to the Switch Ports
This section describes how to connect to the fixed switch ports and the SFP module ports.
Connect to 10/100/1000 Ports
Follow these steps:
When you connect to servers,
Step 1
workstations, IP phones, wireless
access points, and routers, insert a
straight-through, twisted four-pair,
Category 5 cable in a switch
10/100/1000 port.
Use a crossover, twisted four-pair,
Category 5 cable when you connect to
other switches, hubs, or repeaters.
Insert the other cable end into an RJ-45 connector on the other device.
Step 2
The fixed ports on the Catalyst 3750 Power over Ethernet (PoE) switches provide PoE support for
IEEE 802.3af-compliant devices. They also provide Cisco pre-standard PoE support for Cisco
IP Phones and Cisco Aironet Access Points.
Each of the 24 10/100/1000 switch ports can deliver up to 15.4 W of PoE. Any combination of the
ports can deliver an average of 7.7 W of PoE at the same time, up to a maximum switch power output
of 370 W.
By default, a Catalyst 3750 switch PoE port automatically provides power when a valid powered
device is connected to it. For information about configuring and monitoring PoE ports, see the switch
software configuration guide. For information about troubleshooting PoE problems, see the
Catalyst 3750 Switch Hardware Installation Guide on Cisco.com.
The automatic medium-dependent interface crossover (auto-MDIX) feature is enabled by
Note
default on switches running Cisco IOS Release 12.2(18)SE or later. When the auto-MDIX
feature is enabled, the switch detects the required cable type for copper Ethernet connections
and configures the interfaces accordingly. Therefore, you can use either a crossover or a
straight-through cable for connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP
module port on the switch, regardless of the type of device on the other end of the connection.
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13
14
15
16
13 X
17
18
19
20
21
22
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24
23 X
14 X
24 X
10/100/1000 ports
C at al y st
3 7 5 0 G
W ir el es
SE RI ES
P o E -2 4
s L A N C
o n tr o ll er
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